Research at Stevens Institute of Technology

Jerry Wu

Advisor: Professor Yao

About Me

I am from Carmel, IN. I am double majoring in Electrical and Computer Engineering (ECE) and Economics at Duke University. During this summer, I am currently at Stevens Institute of Technology in NJ doing research.

Weekly Report

Week 1

• Read background on fading signals and outage analysis.
• Used a probability function to represent both the relevant and interference signals.
• Found integral representing the outage probability.
• Used infinite series to represent the probability.
• Read the relevant sections in a probability textbook.

Week 2

• Studied the properties of the probability function that is used.
• Tried alternative methods of integration such as using characteristic equations.
• Read about a simplification technique for solving relevent problems.
• Tried to extend the simplifcation technique to arrive at a better approximation.
• Brainstorming other methods of approximation.

Week 3

• Examined the simple case of Raleigh envelope and exponential power.
• Approximation using three impulses weighted by normalized values in the pdf.
• Approximation using three impulses weighted by cdf.
• Approximation using uniform distribution for the interferer signal.
• Plotted each new simplification technique with the exact equation and original simplification technique for comparison.

Week 4

• Final adjustment to uniform distribution approximation of the interferer signal.
• Weibull power outage probability plotted by MATLAB.
• Sum of Weibull random variables.
• Familiarize myself with the wireless drifter using past documentations.
• Began reading current VB code for the GUI and learning how to use Eagle Layout Editor for the power supply.

Week 5

• Familiarized myself with Beaulieu Series, which can be used to yield an expression for the truncation error.
• Finished the tutorial on using the Eagle Layout Editor and examined the layout for the current wireless drifter.
• Finished understanding the current VB code for the GUI and began modifying the code.

Week 6

• Commented the code, including use of each function and most global/local variables.
• Replaced Magnetic Level indicator with a Sound Level indicator.
• Added in an option to set a sound threshold such that the user will be alerted if the sound level goes above the threshold.
• Found some obsolete code that seems to be from a previous version of the GUI.

Week 7

• Used Taylor series to represent Weibull/Rayleigh fading environment.
• Used Taylor series to represent the general case when nonzero noise is considered.
• Used Taylor series to represent multiple interferences, both identical and nonidentical
• Found that the method of using Taylor series has problems with convergence.
• Added second column of statistics to the wireless drifter GUI and changed the code so that up to two drifter data can be shown at once.

Week 8

• Continued working on the wireless drifter GUI.
• Writing up the final report containing a paper on outage probability.
• Read through part of the IEEE standard style manual.
• Learned how to use BibTex.

Week 9

• Continued working on the wireless drifter GUI.
• Finished the final report.
• Finished the paper on outage probability except for the numerical analysis section.